Asking Biden to testify, and getting mad when he refuses, may signal the death rattle of the impeachment effort.

Rep. James Comer (R-Ky.), who chairs the House oversight committee, has formally asked President Joe Biden to testify in the impeachment inquiry against him led by Republican lawmakers.

In a letter to Biden on Thursday, Comer said “it is in the best interest of the American people” for the president to answer questions about whether he was involved in his son Hunter’s foreign business deals.

The White House responded by pointing to a social media post from last week where Biden spokesperson Ian Sams wrote “LOL,” alongside a “facepalm” emoji, after Comer first said he’d seek Biden’s testimony.

“Comer knows 20+ witnesses have testified that POTUS did nothing wrong,” Sams wrote on March 20. “He knows that the hundreds of thousands of pages of records he’s received have refuted his false allegations.”